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100mm Aluminum Loop Block

Part No. 3245

Sheave Ø (mm) 100 mm

Sheave Ø (in) 3 15/16 in

Maximum line Ø (mm) 16 mm

Maximum line Ø (in) 5/8 in

Maximum working load (kg) 3402 kg

Maximum working load (lb) 7500 lb

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. The sheave center carries primary load, allowing a smaller, lighter weight block. The soft-attachment Loop block has a removable deadend post for attachment to a padeye. Lashings can also be used. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
Sheave Ø (mm)100 mm
Sheave Ø (in)3 15/16 in
Length (mm)128 mm
Length (in)5 1/16 in
Weight (g)371 g
Weight (oz)13.09 oz
Maximum line Ø (mm)16 mm
Maximum line Ø (in)5/8 in
Maximum working load (kg)3402 kg
Maximum working load (lb)7500 lb
Breaking load (kg)6804 kg
Breaking load (lb)15000 lb
Composer Export254163BOM IDDescriptionQty1AL-3427 DEAD END POST12AL-3751 ALPHA CHEEK13AL-3752 BETA CHEEK14H-34391A SHEAVE ASSM.15HBB87 ROLLER CAGE ASSM.16HFS1271 FST. 6 X 1 X 16MM SHCS1tooltip
ID BOM Qty Price
AL-3751 1 more info

Sideplate with Helicoil - 100 mm Black Magic Loop Block

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface.

AL-3752 1 more info

Sideplate with Isolator - 100 mm Black Magic Loop Block

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface.

AL-3427 1 more info $23.55
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Dead-End Post - 100 mm Black Magic Loop Block

Patented Loop blocks have a removable deadend post for attachment to a padeye.

HBB87ASSY 1 more info

Roller Cage Assembly - 100 mm Black Magic Block

Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

HFS1271 1 more info $0.54
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Fastener - M6 x 1 x 16 mm Socket Head Cap Screw, Black

Fasten with M6 hex wrench.

H-34391A 1 more info $81.30
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Sheave Assembly - 100 mm Black Magic Block

Sheaves are Hard Lube-anodized for maximum UV protection and a smooth surface. Captive Delrin® ball bearings carry side loads.

F R E E   G R O U N D  S H I P P I N G

for orders over $100!

Valid on orders shipping within the United States

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